NCERT Solutions Class 10 Mathematics Chapter 9 Some Application of Trigonometry
Q.1) A circus artist is climbing a 20 m long rope, which is tightly stretched and tied from the top of a vertical pole to the ground. Find the height of the pole, if the angle made by the rope with the ground level is 30° Sol.1) Let AB be the vertical pole AC be…
NCERT Solutions Class 10 Mathematics Chapter 8 Introduction to Trigonometry
Exercise 8.1 Q.1) In Δ ABC, right-angled at 𝐵, 𝐴𝐵 = 24 𝑐𝑚, 𝐵𝐶 = 7 𝑐𝑚. Determine : (i) sin 𝐴 , cos 𝐴 (ii) sin 𝐶 , cos 𝐶 Sol.1) In 𝛥 𝐴𝐵𝐶, ∠𝐵 = 90° By Applying Pythagoras theorem , we get 𝐴𝐶2 = 𝐴𝐵2 + 𝐵𝐶2 = (24)2 + 72 = (576 + 49)𝑐𝑚2 = 625 𝑐𝑚2 ⇒ 𝐴𝐶 = 25 (…